POTASSIUM Antonyms There are 10 antonyms of the word potassium. (opposite meanings)Did you mean?Definition of POTASSIUMBest Opposite Words For POTASSIUMTop 20Top 10 Top 20 (Default)Top 50 Top 100 All All (Default)WordsPhrases All All (Default)Verb Noun Adjective Adverb RankWordSave?Synonyms..UsageType1aluminumnoun, adjectiven, adj2argonnounn3calciumnounn4chlorinenoun, adjectiven, adj5ironverb, noun, adjectivev, n, adj6magnesiumnounn7neonnoun, adjectiven, adj8phosphorusnounn9sodiumnounn10sulfurnounn Alternatives for ALUMINUM Words (2)alaluminiumPhrases (1)atomic number 13Opposite words for aluminum Alternatives for ARGON Words (1)arPhrases (1)atomic number 18Opposite words for argon Alternatives for IRON Words (18)cast-ironferrousironingironwareironworkmetalsmeltsteeladamantadamantinebrassboundpressenergyfeflatironforceferrumshacklesPhrases (4)smoothing ironatomic number 26branding ironiron outOpposite words for iron Alternatives for NEON Words (1)nePhrases (1)atomic number 10Opposite words for neon Alternatives for PHOSPHORUS Words (2)daystarluciferPhrases (2)atomic number 15morning starAbbreviations (1)pOpposite words for phosphorus